Separated Anode Experiment to Measure Gas Transport and Methane Reforming within Solid-Oxide Fuel Cell Anodes
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Experiment to Measure Gas Transport and Methane Reforming within SolidOxide Fuel Cell Anodes Amy E. Richards, Neal P. Sullivan, Huayang Zhu and Robert J. Kee MRS Proceedings / Volume 1385 / 2012 DOI: 10.1557/opl.2012.973
Link to this article: http://journals.cambridge.org/abstract_S1946427412009736 How to cite this article: Amy E. Richards, Neal P. Sullivan, Huayang Zhu and Robert J. Kee (2012). Separated Anode Experiment to Measure Gas Transport and Methane Reforming within SolidOxide Fuel Cell Anodes. MRS Proceedings,1385, mrsf111385c0701 doi:10.1557/opl.2012.973 Request Permissions : Click here
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Mater. Res. Soc. Symp. Proc. Vol. 1385 © 2012 Materials Research Society DOI: 10.1557/opl.2012.973
Separated Anode Experiment to Measure Gas Transport and Methane Reforming within Solid-Oxide Fuel Cell Anodes Amy E. Richards1, Neal P. Sullivan1, Huayang Zhu1, and Robert J. Kee1 1 Mechanical Engineering, Colorado School of Mines, Golden, CO 80401, USA ABSTRACT Solid-oxide fuel cell (SOFC) performance depends greatly upon electrode design. The composite anode plays a critical role in fuel reforming, especially when hydrocarbons are included in the fuel mixture. Because direct observation of fuel reforming in a functioning SOFC is difficult, if not impossible, an alternative experimental configuration is needed to evaluate anode performance. The Separated Anode Experiment (SAE) is designed to isolate and study porous-media transport and heterogeneous reforming chemistry in SOFC anodes. Although the experiment does not incorporate a dense electrolyte membrane or a cathode, it is configured to replicate important aspects of anode behavior in a fully operational SOFC. The experiment is also designed to facilitate model-based interpretation of the results. Comparisons of two significantly different anode structures are used to illustrate the experimental and modeling capabilities. INTRODUCTION Solid-oxide fuel cell (SOFC) performance depends on multi-component gas transport, thermal catalytic chemistry, and electrochemical charge transfer within porous composite (e.g., cermet) anode structures. This paper describes an experiment that is designed specifically to isolate and measure gas transport and catalytic chemistry within the anodes [1,2]. As illustrated in Figure 1 an anode-support structure without electrolyte or cathode layers is sandwiched within ceramic manifolds into which two rectangular gas flow channels are machined. The anode support is typically on the order of a millimeter thick. The gas channels have hydraulic diameters and lengths of approximately one millimeter and three centimeters, respectively. The upper channel typically carries a fuel mixture and the lower channel carries gases that represent products of charge-transfer chemistry (e.g., H2O and CO2) which are also hydrocarbon-reforming agents. The assembly is operated in a furnace at typical SOFC operating temperatures around 800 °C. Gases enter the chann
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